'The Newsroom' season two video teaser unveiled by HBO - watch

HBO has released a first look video teaser for The Newsroom season two.

The Aaron Sorkin drama will return to US screens on Sunday, July 14 at 10/9c.

Jeff Daniels, Emily Mortimer, Olivia Munn and the remainder of season one's cast will all return, alongside new stars Marcia Gay Harden (Damages) and Constance Zimmer (House of Cards).

The new run will focus on the events of the 2012 US presidential campaign, with HBO's synopsis reading: "The staff of News Night chases a mysterious tip, which leads to a story that ultimately spins out of control."